Attachment for engines



F. E. DUNN.

ATTACHMENT FOR ENGINES.

APPLICATION FILED JAN. 31, 1920.

1,383,087. Patented June 28, 1921.

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Unventor.

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F. E. DUNN.

ATTACHMENT FOR ENGINES.

- APPLICATION FILED JAN 31, I920.

Patented June 28, 1921.

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FELIX EWING DUNN, 0F NANTQN, ALBERTA,

0F CALGARY, ALBERTA, (JANADA, AND ONE-HALE QTAJVIES ALEXANDER NESBITT,

ONE-HALF T0 CANADA, ASSIGNOR OF TU STEPHEN BURTON MITCHELL, 0F NANTON, ALBERTA, CAJTADA.

ATTAC'NT FOR ENGINES.

Specification of Letters Patent.

Patented June 28, 1921.

Application filed January 31, 1929. Serial No. 355,381.

To all whom it may concern:

Be it known that I, FELIX E. DUNN, a citizen of the United States of America, residin at Nanton, in the Province of Alberta and ominion of Canada, have inventedv new and useful Improvements in Attachments for Engines, of which the following is a specification.

This invention relates generally to vacuum devices for retaining oil in the crank case of automobiles and other internal "combustion engines, and is particularly directed to a novel form of vacuum producing means combined with means for efficiently controlling the vacuum formed.

The improvement is further directed to a novel construction of valve carrying casings having means whereby the same may be attached to the carbureter and the hot air intake therefor as well as to a pipe connected with the breather oroil supplying nozzle a vacuum will be formed in the crank case by the suction of the carbureter through the pigs attachment with the breather.

he foregoin objects and others which will appear as t e nature of the invention is better understood may be accomplished by a construction, combination and operative arrangement of parts such as is disclosed by the drawings.

In the drawings Figure l is a side elevation of the wellknown type of internal combustion engine illustrating the application of the improvement thereon.

Fig. 2 is a top plan View thereof.

Fig. 3 is an approximately central vert1- cal transverse sectional view through the improvement, per 86, on an enlarged scale.

Fig. 4: is a sectional view taken at an angle to that illustrated in Fig. 3.

Fig. 5 is a perspective view of the valve carrying casing.

Referring now to the drawings in detail the numeral 1 designates an internal combustion engine of any well-known type .being preferably of that class used for propelling automobiles. The carbureter for the engine is indicated by the numeral 2, and the fuel intake pipe connected to the can bureter by the numeral 3. The hot air pipe leading from the engine to one end of the carbureter is indicated bythe numeral 4, while the breather pipe, which may also provide the oil inletfor the engine is indicated by the numeral 5.

y improvement essentially includes a casing which is broadly. indicated by the numeral 7. The casing preferablyhas its lower portion widened and itssides provided wit openings which are surmunded with inwardly formed outwardly extending nipples 8 and 9 respectively. The nipple 8 is of a size to be snuglyreceived in the end of the hot air pipe 4:, while the nipple 9 isalso of a size to be snugly received in one end of the carbureter 2. The casing is of a length whereby the upper end thereof is disposed in a line with the breather pipe 5, or rather with the capmember 10 thereof. The cap 10 may have its pipe or flan 'e por tion connected to a longitudinally d1spose'd pipe 11 in any desired or preferred manner, and the said pipe 11 may be integrally formed with the cap. It should also be stated in this connection that if desired the pipe 11 maybe connected directly to the breather pipe 5 instead of to the cap therefor. The pipe 11 is of outer end thereof will receive therein a nipple 12 formed on the upper and inner face of the casin 7.

The opening surrounded by the nipple 8 is normally closed by a saucer shaped valve 13. To this valve is centrally secured a leaf spring 14. This leaf spring has its free end connected, as at 15, to a block 16 secured upon the outer face of the casing 7 and arranged opposite the opening surrounded by the nipple 12. By reference to the drawings it will be noted that the valve 13 is disposed opposite the nipple 9 so that access to the securing element 17 between the -spring l4 and the valve 13 may be obtained.

In a like manner, the block 16 being disposed opposite the opening in the nipple 12 permits of the removal of the securing elea length so that the in the crank casing by the suction of the carbureter through the pipe 11 and the casing 7. The valve spring 14 is comparatively weak so that the vacuum created is only partial or intermittent and is not suflicient to interfere with the free working of the engine. By creating the vacuum within the and transmitting to the carbureter products from the crank casing described, a substantially rectangular casing having registering openings through the side walls adjacent to the bottom thereof, and outstanding fl'langes, surrounding the openings, a saucer shaped valve in the casing surrounding and normally closing one of the openings, a fiat spring secure to the valve and to the inner wall of the casing above the opening closed by the valve, and said casing having its opposite wal provided with an additional opening disposed directly opposite the secured end of the valve, and an outstanding flange surrounding said lastmentioned opening, all asand for the purpose set forth.

In testimony whereof I affix my signature.

FELIX EWING DUNN. 

